Fanning-mill for cleaning grain, &amp;c.



PATENTED APR. 26, 1904;

7 J. L. DOUB. PANNING MILL FOR CLEANING GRAIN. 6w.

APPLICATION FILED IAY 1, 1903.

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No. 758,511. PATENTED APR. 26, '1904.

J. L. DOUBQ FA-NNING MILL FOR CLEANING GRAIN, 6w.

7 APPLICATION FILED MAY 1, 1903. IQ MODEL. 2 SHEETS-SHEET 2- @Vitnme JZ3 Z5 j I ha; fittoamug,

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charge of grain from the hopper.

Patented April 26, 1904.

.UNITED STATES PATENT OFFICE.

JOHN L. DOUB, OF MEYERSVILLE, MARYLAND.

FANNlNG-MILL FOR CLEANING GRAIN, ac.

SPECIFICATION forming part of Letters Patent No. 758,511, dated April26, 1904.

Application filed May 1, 1903; Serial No. 155,148. (No model.)

To. ail whom, rlt'mrty concernf Be it known that I, J OHN L. DoUB, acitizen of the United States, residing at Meyersville, in the county ofFrederick and State of Maryland, have invented new and usefulImprovements'in Fanning-Mills for Cleaning Grain, &c., of which thefollowing is a-specification. My invention relates to fanning-mills forseparating and cleaning grain, seed, &c.; and its primary object is toprovide a machine of this character in which simplicity and compactnessof construction will bev combined with efficiency in operation andresult.

The invention comprises a novel construction and relative arrangementpflongitudi; nally-reciprocating screens, improved means for regulatingthe flow of grain over the screens, and means for effecting the requiredshaking movement of the screens.

The construction of the machine will be fully described hereinafter inconnection with the accompanying drawings, which form part of thisspecification, and its novel features will be particularly set forth inthe appended claims. V

In the drawings, Figure 1 is a longitudinal vertical section of amachine embodying the invention. Fig. 2 is a side elevation of the sameon a reduced scale. Fig. 3 is a front elevation of the machine, and Fig.4 isadetail plan view of the rear end of one of the reciprocatingscreens employed. Fig. 5 is a detail plan view of the bell-crank leverand pitman for reciprocating the upper screen.

The supporting-frame of the machine comprises standards 1, suitablybraced together, and 2 designates a fan-casing secured within the frame.This casing may be of any preferred construction and is provided withthe usual hopper 3, within which is a feed-roll Land a regulating-slide5 for controlling the dis- An inclined fender or guard 6 directs thegrain from the hopper to the upper screen 7, where it is subjected tothe fan-blast. The screen 7 is suspended by suitable hangers 8 withinthe front end of the casing, and a reciprocating motion transversely ofthe machine is imparted thereto by any suitable means operated from thefan-shaft 9, the latter being so pported in bearings at the rear of theframe.

I For this purpose I have indicated in dotted lines in Fig. 1 a pitman10, having a crank connection .at one end with the fan-shaft andconnected at its, opposite end to a horizontallydisposed bell-cranklever 11, which is also connected to one side of the screen.

. 12 designates the fan, which is of the usual constructionand mountedupon the shaft 9, the latter being provided at one end with a hand-crank(not shown) for revolving the shaft and fan to direct a blast of aironto the contents of the screen 7.

Below the transversely-reciprocating screen 7 is suspended a framecomprisingoppositelyinclined side bars13 and 1i,connected by ver' ticalbraces 15. This frame is suspended from the standards 1 by pivotedhangers 16 in such a manner as to permit a longitudinal swinging motionof the frame.

17 designates a screen supported between the upper'sid'e bars 13 of theframe and formed at its rear end with open spaces 18 of suflicient sizeto permit the passage therethrough of the grain which has passed overthe mesh of the screen.

To retard the flow of grain over the. screen 17, a baffle 19, of canvasor other fabric, is attached to the sides of bars 13 at a properdistance above the screen to be struck by the grain as it is agitated bythe shaking of the Screen.

' A screen 20 is supported loetween the lower side bars 14 of theframe.said screen, as clearly shown in Fig. 1, being inclined in adirection opposite to that of the inclinationof the screen 17. Above thescreen. 20 is also arranged a fabric cover 21 to retard the flow ofgrain.

Below each of the screens 17 and 20 adjacent Lil ed in bearings at thefront end of the frame, and a single shaft 26 is mounted at the rear endof said frame. Upon these shafts are mounted sprocket wheels 27 and 28,over which pass sprocket-chains 29. Secured to the sprocket-chains atintervals are transverse bars 30, having their opposite faces 31 beveledto adapt them to readily pass under the screens 17 and to serve ascleaners or scrapers and prevent the clogging of the screens. Therevolution of the chains is effected by means of a sprocket-wheel 32,mounted on one end of the shaft 26 and connected by a driving-chain 33with a sprocket-wheel on the fan-shaft 9.

A crank-shaft 34 is supported in bearings 35 at the rear of the frame ofthe machine and connected by a pitman 36 to the under side of thescreen-frame. This shaft 34 is revolved by a sprocket-chain 37 andsprocketwheels 38 and 39, mounted, respectively, upon the shafts 9 and34.

To adapt the machine for cleaning clover and other seeds, I provide atthe front thereof a transversely-extending trough 40, having a groove 41to support a removable fender 42, which projects upwardsufiiciently tocatch any seeds which may be blown from the screen 7. The seeds whichaccumulate in the trough are automatically returned to the hopper bymeans of an endless elevator driven from the fan shaft by a chain 43 andsuitable sprocket-wheels.

The operation of the machine constructed as thus described will bereadily understood. The grain fed through the hopper falls upon thescreens 7, thence to the rearwardly-inclined screen 17 Such waste asdrops through the screen 17 passes to the upper trough 22, while thegrain drops through the openings 18 of said screen onto theforwardly-inclined screen 20, being finally received by the trough 23.

It will be apparent that my suspended screenframe affords means forreciprocating both of the inclined screens by a single shaft connectionand provides'a simple and compact structure. The relative arrangement ofthe screens is such as to insure a thorough agitation of the grain andan effective cleaning and separation thereof.

I would have it understood that I reserve the right to make all suchvariations and modifications in the details of the machine as may beresorted to without departing from the invention as defined in thefollowing claims.

I claim 1. In a fanning-mill, a hopper, a transversely-reciprocatingscreen beneath the hop- 7 per, and a fan located at one side of saidscreen, in combination with alongitudinally-reciprocating frame,comprising screens inclined at an angle to each other;oppositely-inclined discharge-spouts, and a runway formed below eachscreen adapted to receive traveling;

scrapers for simultaneously cleaning the under side of each screen toprevent the clogging of said screens.

2. In a fanning-mill, a hopper; a transversely-reciprocating screenlocated beneath the hopper, and a fan located at one side of saidscreen, in combination with a reciprocating screen-frame, suspendedbeneath said screen, and having screens inclined at an angle to eachother, arunway formed below each screen, sprocket wheels, endlesssprocketchains provided with transverse scrapers, and means foroperating said sprocket-wheels and chains, whereby the transversescrapers are caused to travel through both runways and simultaneouslyclean the under side of each screen during the reciprocation of saidscreenframe.

3. In a fanning-mill, a hopper, a transversely-reciprocating screenbeneath the hopper, and a fan at one side of said screen, in combinationwith a reciprocating screenframe, having screens located at an angle toeach other, and located beneath the reciprocating screen, the upper oneof the screens on the screen-frame having a grating at its dischargeend; an inclined trough beneath said discharge end, and troughs beneaththe discharge end of the second screen of the screenframe; and means foroperating the several aforesaid movable parts, as herein set forth.

4. In a fanning-mill, a hopper, a transversely-reciprocating screenbeneath the hopper, and a fan at one side of said screen, in combinationwith a reciprocating screen-frame beneath said screen, and havingscreens inclined at an angle to each other, yielding flexible strips,located adjacent to said inclined screens, and serving as bafi'les toretard the flow of grain; and means for operating the several aforesaidmovable parts, as herein set forth.

5. In a fanning-mill, a hopper, a transversely-reciprocating screenbeneath the hopper; and a fan adjacent to said screen, in combinationwith a reciprocating screen-frame, located beneath said screen,andhaving screens located at an angle to each other. an inclined troughbeneath the lower end of the upper one of said screens, inclined troughsbeneath the lower end of thelower one of said screens, and endlesstraveling mechanism carrying transverse scrapers bearing on the underside of said screens, yielding flexible baffle-strips located adjacentto the outer surface of said screens to retard the flow of grain, andmeans for operating the several named movable parts, as herein setforth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN L. DOUB. Witnesses:

JOHN L. ROUTZAHN, WALTER L. REMsBERe.

